Harrow.



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NARROW (Application led Dec. 10, 189B.) (No Model.;

- UNITED STATES PATENT OEETCE.

OLE K. OPPEN, OF VORTHINGTON, MINNESOTA.

HARROW.

SPECIFICATION forming part of Letters Patent N o. 633,270, datedSeptember 19, 1899.

Application tiled December 10, 1898. Serial No. 698,820. (No modelJ Toall wiz/m it may concern:

Be it known that l, OLE K. OPPEN, a citizen ot' the United States,residing at Worthington, in the county of Nobles and State of Minnesota,have invented certain new and usefullmprovements in Hai-rows; and I dodeclare the following to be a full, clear, and

exact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

My invention relates to improvements in harrows; and the object is tosimplify and improve the construction and increase the efficiency anddurability of the implement.

To these ends the invention consists in a novel construction of thedraft-bars,tl1e crossbars, and in the bracket employed to couple theseparts together. p

The invention further consists in the construction, combination, andarrangement of the coupling devices, as will be hereinafter more fullydescribed,and particularly pointed out in the claims.

In the accompanying drawings the same reference characters indicate thesame parts of the invention.

Figure 1 is a perspective view of a harrow embodying my invention. Fig.2 is an e11- larged detail perspective view of the coupling connectingthe draft-bars and the transverse barrow-tooth bars. Fig. 3 is asimilarview showing the manner of connecting the draftbars and coupling.Fig. 4 is-a similar View showing the manner of connecting the couplingand the transverse barrow-tooth bars.

1 1 denotes the T-iron draw-bars, which are connected by the diagonalbrace-rod 2.

3 3 denote the transverse T-iron harrowtooth bars, which are connectedto the drawbars by the couplings 4 4. Eachcoupling consists of a shortsleeve 5, which encompasses the draw-bar, and a similar sleeve 6,arranged beneath and at a right angle to and integral with the sleeve 5,and it encompasses the transverse bar. The inner face of the upper wallof the sleeve 5 is formed with a segmental locking-lug 7, beveled orpointed at its front end and formed with a lateral stop 8 at its rearend. I

9 denotes a recess formed in the outer or free edge of the central rib10 of the draftbar to receive the segmental lug 7, the drawbar beingturned so that its central rib 10 is horizontal, in which position it isinserted in the sleeve 5 until the recess 9 in said drawbar is alinedwith the lug 7 in the sleeve.

circle on its axis, which brings the rib 10 to a vertical position, withthe lug extending through the recess in the rib and the rib restingagainst the limit-stop S. In this position the draw-bar is securelylocked in the sleeve 5 against any longitudinal movement whatever. Thesleeve 6 is also formed with an internal segmental lug 12, the rear endof which terminates in a lateral stop 13.

14 14 denote two (2) longitudinal ears formed on the opposite edges otthe sleeve b', and they are alined with the front end ofthe locking-lug12.

The transverse iiange 15 of the bar 3 is curved to correspond to ltheinner wall of the sleeve 6, on which it bears, and the central rib 16 ofsaid bar is formed with a notch 17 to receive the locking-lug 12 in thesleeve.

In assembling the'parts `the draft-bar is first secured in the sleeve 5,as liereinbefore described, and the bar 3 is then inserted in the sleeveG until the notch 17 in its central rib isA alined with the lug 12 andthe bar 3 turned on its axis to engage said rib 16. The longitudinalears 14 14 are now turned radially inward to project into the path ofthe outer edge of the rib 16. This arrangement effectually locks the bar3 in the sleeve 6 and at the same time permits it to be rotated Thedraw-bar is now turned a quarter of a on its axis for about one-quarter(i) of a circle or the distance the central rib is permitted tooscillate between the stops 13 and 14.

The transverse bars 3 3 are provided with the barrow-teeth 18, and eachbar has secured to it a'vertical arm 19, the upper ends of the arm beingconnected by a bar 20, so that the entire series of transverse bars maybe simultaneously turned on their axes.

The pivot-bolt 22, which connects the vertical arm 19' with the bar 20,also extends through an oritice in the lower end of the hand-lever 23and an axial orifice in the segmental rack 24, and the opposite side'otthis lever 23 is provided with an extension-plate 25, which extends downon the outside of the rack 24 and is secured to the arm 19 by the bolt26.

IOO

A spring locking-bolt 27, carried bythe hand-lever 23, projects into thenotches in the rack for the purpose of locking the lever in the positionto which it may be adjusted, and this bolt 27 is manipulated by the rod28, extending to the grip 29, pivoted to the upper end of thehand-lever.

The rear end of the rack 24 is formed with a socket 30, in which isseated a coiled spring 31, and a rod` 32, having its lower end formedwith a hook 33 to engage the bar 20, extends upward through an orificein the socket 30 and through the spiral spring 3l, and it is supportedin this position by the adjustingnut 34, and by adjusting this nut up ordown a greater or less tension is imparted to the spring 3l, so as topermit of a corresponding vibratory movement of the harrow-teethindependently of the inclination to which they may be adjusted by thehand-lever 27.

Although I have specifically described the construction and relativearrangement of the several elements of my invention,I do not desire tobe confined to the same, as such changes or modifications may be made asclearly fall Within the scope of my invention without departing from thespirit thereof.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

l. In a harrow of the class described, the combination with the T-shapeddraft-bars and thc correspondingly-formed transverse harrow-tooth bars,of a coupling consisting of two integral sleeves axially arranged atright angles to each other to encompass said draw and transverse bars,substantially as and for the purpose set forth.

2. In a hai-row of thc class described, the

combination with the T-shaped draftbar having a central-notched rib, ofthe encompassing sleeve, provided with a coacting lug, substantially asand for the purpose set forth.

3. In a harrow of the class described, the combination with the T-shapedbarrow-tooth bars formed with a central rib, of the encompassing sleeve,the rib being provided with a notch or recess and the sleeve with acoacting lu g, substantially as described.

4. In a hai-row of the class described, the combination with the notcheddraw and harrow-tooth bars, of a coupling consisting of two integralsleeves formed with interior segmental locking-lugs and adapted toencompass and engage the notched portions of said draw and transversebarrow-tooth bars, substantially as set forth.

5. In a harrovsT of the class described, the

` combination with the notched draw-bari and the notched transversebarrow-tooth bar 3, of the sleeve 5 adapted to encompass the bar l andformed with a segmental locking-lug 7 arranged to extend through thenotch in said draw-bar, and the sleeve 6 formed integral with saidsleeve 5 and adapted to encompass said bar 3, and provided with thesegmental locking-lug12,arranged to engage the' notches in said bar 3,and thelongitudinal ears 14 14 arranged to lock said bar 3 on said lugl2, substantially as and for the purpose set forth.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

OLE K. OPPEN.

Titnessesz GILBERT ANDERSON, NEWTON FAUSKEE.

